Advertisement
IC, MSM6576-99-GS-K
Pin No.
Pin Name
I/O
1
HOLD
I
'H': Normal operation, 'L': Hold key (main unit side).
2
BLS/REV MODE
I
'H' :Endless and BLS ON, 'L' :One cyde and BLS OFF.
3
DOLBY SW
I
'H': Dolby ON, 'L': Dolby OFF.
4
RESET
I
Reset input terminal.
5 ~ 7
TEST1 ~ TEST3
-
Test terminal (connected to ground).
8
BRAKE
O
'H': Brake ON, 'L" :Brake OFF.
9
MOT HI
O
'H': High speed, 'L': Normal speed.
10
MOT DIR
O
'H" :Clockwise direction, 'L' :Counterclockwise direction.
11
MOT ON
O
'H': Motor ON, 'L': Motor OFF.
12
POP
I
'H': POP ON, 'L': POP OFF.
13
JAZZ
I
'H' : JAZZ OFF, 'L' : JAZZ ON.
14
ROCK
I
'H' : ROCK OFF, 'L' : ROCK ON.
15, 16
XTB, XT
-
Crystal oscillator terminal.
17
VDD
-
Power supply terminal.
18, 21
VSS1, VSS2
-
Ground terminal.
19, 20
VCM, VCP
-
Internal electronic potential generator terminal.
22
VEE
-
Power supply terminal for internal logic.
23
L. V. STOP1
I
Reference input terminal for detection of reduce volatage stop.
24
L. V. STOP2
I
Signal input terminal for detection of reduce volatage stop.
25
REMOTE
I
Key input (remote controller side).
26
P-SNSR
I
Photo sensor input.
27
BUZR
O
Alarm sound output.
28
MID
O
'H' :When POP mode, 'L' :When not POP mode.
29
DIS CH
O
'H' :When DIS CH, 'L' :When normal.
30
BASS
O
'H' :When ROCK, JAZZ mode, 'L' :When not ROCK, JAZZ mode.
31
MS IN
I
'H' :Exist tune, 'L' :Not exist tune.
32
POWER ON
O
'H' :Power ON, 'L' :Power OFF.
33
LED CONT
O
Photo sensor LED control terminal.
34
F/R CTRL
O
'H' :FWD, 'L' :REV.
35
MUTE
O
'H' :Mute OFF, 'L' :Mute ON.
36
C-SW
I
'H': Exist cassette tape, 'L': Not exist.
37
EJECT SW
I
'H': Open cassette cover, 'L': Close cassette cover.
38
TIMING SW
I
'H' :PLAY, REC PLAY, 'L' :No cassette, STOP, FF, REW.
39
VDD
-
Power supply terminal.
40
STOP
I
Stop key input (main unit side).
41
PLAY
I
Play key input (main unit side).
42
FF
I
FF key input (main unit side).
43
REW
I
REW key input (main unit side).
44
JACK IN
I
'H' :Disable remote controller key input, 'L' :Able input.
Description
A
MAIN C.B
SFR 401
1
IC801
<TAPE PLAYER SECTION>
1. Tape Speed Adjustment
Settings :
• Test tape :
TTA – 100 (Tape center)
• Test point :
Phones Jack (J101)
• Adjustment location : SFR401
• Dolby NR :
OFF
• MSP :
CLASSIC
• Direction :
FWD
• Tape selector :
NORM
• Volume :
MAX
Method : Play back the test tape and adjust SFR401 so that
the frequency becomes 3015Hz ± 10Hz. Then
confirm WOW is less than 0.55%.
2. Dolby Level Adjustment
Setting :
• Test tape :
TTA – 200
• Test point :
TP1(Rch),TP2(Lch),GND
• Direction :
FWD
• Tape selector :
NORM
• Dolby NR :
OFF
• Volume :
MIN "0"
• Adjustment points : Soldered patterns
Procedure : Short the patterns via solder as showen in the
table so the Dolby NR level is 24.5mV ± 1.0dB.
Adjust so the specifications are satisfied in both
the forward and reverse directions. Connect 10µF
/16V coupling capacitors between test points and
test equipment (connect the positive terminals to
the test points).
SOLDER PATTERN
–
STANDARD : 24.5 ± 1.0dB
SHORT
OPEN +
only
+1dB
only
+1.5dB
Lch
and
+2.5dB
only
+1dB
only
+1.5dB
Rch
and
+2.5dB
2
GND
2
1
PHONES
J101
TP1
(R-CH)
TP2
(L-CH)
2
4
VR101
1
3
IC101
VOLUME
2
<TAPE SECTION>
Tape speed :
3015Hz ± 50Hz
Wow :
Less than 0.52% (RMS)
Take-up torque :
20 ~ 30g-cm (FWD,REV)
F.F torque :
70 ~ 150g-cm
Rew torque :
70 ~ 150g-cm
Back tension :
1 ~ 3g-cm (FWD,REV)
S/N ratio :
More than 42dB(PB,DC)
Distortion :
Less than 3.0%(PB,DC)
Noise level :
Less than 3.0mV
(Vol MAX, PB,DC)
Less than 0.3mV
(Vol MIN, PB,DC)
Frequency response :
63Hz + 3/– 5dB ~
8kHz + 4/– 4dB
(NORM)
63Hz + 3/– 5dB ~
10kHz + 4/– 4dB
(METAL)
Test tape :
TTA – 100
–
TTA – 200
TTA – 210
TTA – 310 (METAL)
TTA – 320 (NORM)
Advertisement
